The document discusses the absorption process in the small intestine, noting that the small intestine has a large surface area due to villi and blood capillaries that allow for rapid absorption of digested nutrients like glucose, amino acids, and vitamins into the bloodstream, while fatty acids and fat-soluble vitamins are absorbed into lacteals. An experiment using a Visking tube to model the small intestine showed that starch particles were too large to pass through but glucose could, demonstrating how carbohydrates must first be broken down by enzymes into absorbable monosaccharides like glucose before absorption.

3. Absorbtion of Digested product
Digestion product
Small intestine
absorbed
Blood circulatory
system & lymphatic
system

4. Absorption is depends on the large surface
area of small intestine to blood circulatory.
villi
Blood capilary
Large surface

5. •Human intestine is 6 meter long, provides large
surface area.
•The walls of small intestine is lining with tiny
protrusions called villus.
•Each villus have network blood capilaries, lacteal
Villus

6. The villi increase the surface area of small
intestine. So, the absorption of digestion
product is faster.
-Glucose, amino acids, minerals and water
soluble vitamin B, C are absorbed into blood
capilaries.
-Fatty acids, glycerol, fat soluble vitamin
A,D, E, K are absorbed in lacteal

7. Showing the process of absorption of glucose
through Visking tube
Result:
Distilled Starch Glucose
water
Beginning -ve - ve
Visking 30 -ve + ve
tube minutes
Glucose solution
+ starch solution

8. Discussion:
1. Visking tube act as small intestine.
Distilled water act as blood.
Conclusion: glucose is a simple molecule.
It can absorb through small intestine.

9. Visking tube Glucose
(membrane particles
digestive systems) can go
through
Starch + glucose
the
(digestion food)
Membrane
Water (blood) cell
Starch particles were too large to go through the holes
in the Visking tube.
c. Amylase enzyme in the intestine breaks the starch molecules
into glucose.
b. The glucose molecule are small enough to pass through the
Visking tube.

10. 1.What is the importance of step 6?
-To ensure that the outer surface of the
Visking tube does not have starch or
glucose
2. Which food diffuses through the Visking
tube? Why?
-Glucose because it has a smaller
molecular size than starch.
3. Based on your results, explain the
absorption of carbohydrate in the gut.
-Carbohydrates must be broken down into
glucose before absorption can take place.